The prequel is divided into two parts: "Clara" and "The Doctor." Each part consists of a monologue delivered by its title character.

Clara and the Doctor each walk down memory lane, and discover just how much they don't know about each other. They then reveal that they found out each other's secrets, when they went to Trenzalore. As each speaks, the other stands watching, but immobile.

This story is unique in terms of style: consisting of two parts, each with a monologue from either Clara or the Doctor. It also breaks the fourth wall, something uncommon in stories meant to be set in the DWU. The fact it is set amongst props from previous episodes also makes it difficult to rationalise in terms of canon.